Setting Procedure Of Real Sensorless Vector Control (Torque Control) - Mitsubishi Electric FR-E800 Instruction Manual

6.2
Setting procedure of Real sensorless vector
control (torque control)
Sensorless Sensorless Sensorless
Operating procedure
1.
Perform wiring properly. (Refer to the Instruction Manual (Connection).)
2.
Make the motor setting (Pr.71). (Refer to
Set Pr.71 Applied motor to "0" (standard motor) or "10" (constant-torque motor).
3.
Set the motor overheat protection (Pr.9). (Refer to
4.
Set the motor capacity and number of motor poles (Pr.80, Pr.81). (Refer to
Operation does not start when the setting value is "9999" (initial value).
5.
Set the rated motor voltage and frequency (Pr.83, Pr.84). (Refer to
6.
Select the control method (Pr.800). (Refer to
Select Pr.800 Control method selection = "11" (torque control) or "12" (speed/torque switchover) to enable torque
control.
7.
Set the torque command (Pr.804). (Refer to
8.
Set the speed limit (Pr.807). (Refer to
9.
Perform the offline auto tuning (Pr.96). (Refer to
10.
Set the acceleration time to "0" (Pr.7). (Refer to
11.
Perform the test operation.
As required
• Select online auto tuning (Pr.95). (Refer to
• Adjust the torque control gain manually. (Refer to
NOTE
• During Real sensorless vector control, offline auto tuning must be performed properly before starting operations.
• The carrier frequency is limited during Real sensorless vector control. (Refer to
• Torque control is not available in a low-speed (about 10 Hz or lower) regenerative range, or with a low speed and light load
(about 5 Hz or lower and rated torque about 20% or lower).
• Performing pre-excitation (LX signal and X13 signal) under torque control may start the motor running at a low speed even
when the start signal (STF or STR) is not input. This product with the start command ON may also rotate the motor at a low
speed when the speed limit value is set to zero. Confirm that the motor running does not cause any safety problems before
performing pre-excitation.
• Switching between the forward rotation command (STF) and reverse rotation command (STR) must not be performed during
operations under torque control. An overcurrent trip (E.OC[]) or opposite rotation deceleration fault (E.11) will occur.
• If starting may occur while the motor is coasting under Real sensorless vector control, the frequency search must be set for
the automatic restart after instantaneous power failure function (Pr.57 ≠ "9999", Pr.162 = "10").
• When Real sensorless vector control is applied, there may not be enough torque provided in the ultra low-speed range of about
2 Hz or lower.
Generally, the speed control range is as follows.
For power driving, 1:200 (2, 4 or 6 poles) (available at 0.3 Hz or higher when the rating is 60 Hz), 1:30 (8 or 10 poles) (available
at 2 Hz or higher when the rating is 60 Hz).
For regenerative driving, 1:12 (2 to 10 poles) (available at 5 Hz or higher when the rating is 60 Hz).
• To give the constant torque command in the constant output range, set "1" in Pr.803 Constant output range torque
characteristic selection. (Refer to
• For the settings for the SF-V5RU, refer to
page 424.)
page 306.)
page 115.)
page 167.)
page 171.)
page 430.)
page 262.)
page 449.)
page 173.)
page 167.)
page 452.

6.2 Setting procedure of Real sensorless vector control (torque control)

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6. Torque Control